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ext4: update fast commit TODOs

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This series takes care of a couple of TODOs and adds new ones. Update
the TODOs section to reflect current state and future work that needs
to happen.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-5-harshads@google.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar 2021-12-23 12:21:40 -08:00 committed by Theodore Ts'o
parent 0915e464cb
commit d1199b9447
1 changed files with 6 additions and 8 deletions
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14
fs/ext4/fast_commit.c
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@ -156,15 +156,13 @@
* fast commit recovery even if that area is invalidated by later full
* commits.
*
* 1) Make fast commit atomic updates more fine grained. Today, a fast commit
* eligible update must be protected within ext4_fc_start_update() and
* ext4_fc_stop_update(). These routines are called at much higher
* routines. This can be made more fine grained by combining with
* ext4_journal_start().
* 1) Fast commit's commit path locks the entire file system during fast
* commit. This has significant performance penalty. Instead of that, we
* should use ext4_fc_start/stop_update functions to start inode level
* updates from ext4_journal_start/stop. Once we do that we can drop file
* system locking during commit path.
*
* 2) Same above for ext4_fc_start_ineligible() and ext4_fc_stop_ineligible()
*
* 3) Handle more ineligible cases.
* 2) Handle more ineligible cases.
*/
#include <trace/events/ext4.h>